55506087 has 128 divisors (see below), whose sum is σ = 112896000. Its totient is φ = 26127360.

The previous prime is 55506047. The next prime is 55506097. The reversal of 55506087 is 78060555.

It is not a de Polignac number, because 55506087 - 2⁶ = 55506023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55506047) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1353787 + ... + 1353827.

It is an arithmetic number, because the mean of its divisors is an integer number (882000).

Almost surely, 2^55506087 is an apocalyptic number.

55506087 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

55506087 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

55506087 is a wasteful number, since it uses less digits than its factorization.

55506087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 55506087 is about 7450.2407343656. The cubic root of 55506087 is about 381.4581258323.

The spelling of 55506087 in words is "fifty-five million, five hundred six thousand, eighty-seven".